Exploding batteries?

Okay, so last night i was sitting at my computer when i heard this fairly loud exploding noise, kind of like a fire cracker…It sounded like it came from inside my computer, i was like WTF!!! So i opened the case to look around, but to my supprise there was nothing wrong, nothing had an odd scent, everything seemed to be alright, but I kept hearing this weird/annoying ticking sound…

Then, Earlier today, my mouse batteries died while i was playing a game…So i bought new batteries…When i took the battery cover off of my mouse this weird liquid stuff was all over it, and more was leaking from inside…i was super confused…then when i pulled out the batteries, i heard that annoying ticking sound again. The flat side of the battery was half off, acid or something was leaking out, and the battery was making that tikcking noise…

Has anyone else ever had something like this happen to them? :h: :battery: